'exactly' originates from Latin, specifically the word 'exactus,' where 'ex-' meant 'out' and 'agere' meant 'to drive.' 'Measured' comes from Latin 'mensurare,' meaning 'to measure.'

'exactus' transformed into the Old French word 'exacter,' and eventually became the modern English word 'exact.' 'Mensurare' evolved into the Old French 'mesurer,' leading to the modern English 'measure.'

Initially, 'exactly' meant 'out-driven' or 'precisely done,' and 'measured' meant 'to measure.' Over time, they combined to mean 'accurately determined.'